CN2317162Y

CN2317162Y - Four-lever driving mechanism for manpower vehicle

Info

Publication number: CN2317162Y
Application number: CN 97250205
Authority: CN
Inventors: 金洪烈
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-11-18
Filing date: 1997-11-18
Publication date: 1999-05-05
Anticipated expiration: 2007-11-18

Abstract

The utility model relates to a four-lever driving mechanism for a manpower vehicle. The utility model is characterized in that on the basis of not changing the transmission of the existing vehicle, the size of a chainwheel of a centre shaft is reduced, and the central distance of cranks is shortened; outer end holes of the cranks are provided with crank pins, and the crank pins are hinged with a left and a right L-shaped pedal levers on a vehicle frame between the centre shaft and a rear shaft by a left and a right connecting rods; the linking of the pedal levers and the driving of the centre shaft can be realized by the repeating pedaling of the L-shaped pedal levers, and the vehicle body can go forward by the original drive chain. The utility model has the advantages of simple structure, few part, easy fabrication, and low cost. The utility model is applied to the reformation of the existing bicycles and the production of new bicycles, and the utility model can be used for manpower vehicles, such as foot brake vehicles, three-wheel pedal cycles, etc., achieving the purpose of labor saving and high speed.

Description

A kind of four bar driver trains of rickshaw

The utility model belongs to transportation means, B62M 1/04 class, a kind of four bar driver trains of rickshaw.

Current, the bicycle that people generally use is started and operation by foot-operated crank circle Zhou Xuanzhuan.This power the way of initiating makes the effective rate of utilization less than 70 percent of manpower, and forming the dead angle when crank and ground when vertical, makes to start difficulty, and transmitted power is reduced to zero.For overcoming this shortcoming, many schemes have appearred, be preferred version wherein with pedal swinging formula and straight line power the way of initiating, as novel patent CN2034957U of China and CN2072063U, their common feature is to adopt four bar drive configurations of oscillating type pedal rod driven moving the back on the axis, advantage is simple in structure, part is few, need not set up link gear, weak point is that its enforcement all will be transformed existing main body of vehicle frame, can only be used to manufacture and design the car of novel model, safety is also relatively poor, drive line angle generally less (1 °～12 °) when its design-calculated crank and connecting rod start in addition makes to start difficulty though there is not the transmission dead point, starts firmly bigger.

The purpose of this utility model provides a kind of both applicable existing car, can be used for manufacturing and designing four bar driver trains of a kind of rickshaw of new car again.

Four bar driver trains of this rickshaw, comprise axis 7, following chain stay 2 back cant beams 14, treadle axle 4,4 ', and the assembly 3 that is connected, crank 5,5 ' L shaped treadle 6,6 ', connecting rod 11,11 ', sprocket wheel 10, chain 13, rear flywheel 1, it is characterized in that L shaped treadle is by the treadle axle 4 on the assembly 3 that is connected, 4 ' be fixed on down on chain stay 2 and the back cant beam 14, the long limit of L shaped treadle last be treadle, pedal 8 is established in its outer end, 8 ', minor face is being down a rocking bar, rocking bar Xiao 12 is established in its outer end, 12 ', a left side, right crank 5 ', 5, be fixed on axis two outer ends symmetry each other, fixing crank Xiao 9 is established in its outer end, 9 ', connecting rod 11,11 ' two stomidiums by bearing respectively with rocking bar Xiao 12,12 ' and crank Xiao 9,9 ' be connected, constitute two packet sizes crank identical and by Middle axle crank interlock and start the angle and be not less than 12 ° and do not have the four bar driver trains that start dead points, and by being fixed on sprocket wheel 10 and the chain 13 on the axis, rear flywheel 1 constitutes the sealed joint transmission.

The utility model has adopted rocking lever formula power the way of initiating, and treadle pivot angle Ψ≤60 ° of bigger transmission effective powers that improved power of event, forms laborsaving fast speed characteristics.In addition design four bar driver trains related parameter is arranged the time, guaranteed connecting rod and crank o=12 °～20 ° of the drive line angle γ of treadle start bit, make start easily, in order to the transmission effect that reaches the best.This is novel owing to adopted L shaped treadle to integrate treadle and rocking bar function, utilizes the purpose of existing type car axis and drive disk assembly thereof, simplified structure to be achieved thereby make.Its center of oscillation of L shaped treadle is located at its junction point place, and be connected and treadle axle 4,4 ' parallel, the upper and lower of chain stay 2 down in can being located at, between rear axle with treadle axle 4,4 ' one-tenth running-fit with axis, also can be located on the chain stay, be changed to axis 4 when being used for manual tricycle.

Thereby this novel short crank, minor sprocket, short rocking bar of can adopting reduces weightening finish, and can utilize existing car Middle shaft assembly, thereby the transformation of the way reduces manufacturing cost a little.Owing to do not need the linkage of ad hoc treadle, thus realized simple in structure, member is few, easy manufacturing, cost is low and effect is good purpose.This is novel not to be only applicable to existing bicycle transformation and new car manufactures and designs, and can be used for human powered vehicles such as backpedalling brake car and tricycle.

Accompanying drawing 1 is for being used for the integral structure scheme drawing that existing car is transformed

Accompanying drawing 2 is for being used to design the integral structure scheme drawing of new car

Accompanying drawing 3 is this later-model transmission scheme drawing

Below in conjunction with attached Fig. 1 and 2 and with reference to the accompanying drawings 3, illustrate that it drives and the transmission situation:

Shown position is the L shaped treadle 6 ' terminal point position under being in left side, the L shaped treadle 6 on right side is in the start bit of terminal point, at this moment be positioned at the connecting rod 11 in car body left side ', crank 5 ' all the be in left-limit position of its path of motion, and connecting rod 11 ' with crank 5 ', 5 conllinear are MM, the connecting rod that is positioned at the car body right side then is in the limit on the right-right-hand limit position of its path of motion, its line of centers is NN, MM and NN meet at right crank Xiao's center, their angle both had been right crank 5 and the drive line angle γ o of right connecting rod 11 when start bit, be called crank and start the angle, the size of γ o has determined that can four-bar mechanism normal operation, γ o needs only greater than zero degree and both can eliminate the startup dead point in theory, yet too small startup angle makes startup difficulty, this novel startup angle of having adopted γ o=12 °～20 °, and get higher value as far as possible, in the hope of reaching good startup effect.Like this, when depressing right L shaped treadle 6,, and drive axis 7 rotations, realized that four bars drive by the right crank 5 of right connecting rod 11 pullings.Rotatablely moving of axis reaches rear flywheel 1 by sprocket wheel on it 10 and chain 13, thereby car body is advanced.Simultaneously axis rotatablely move and the crank 5 by the left side ' rotation and the left L shaped treadle 6 of left connecting rod 11 ' pulling ' upwards swing from the smallest limit position, thereby realized the interlock of left and right L shaped treadle.Then left L shaped treadle has also arrived the start bit of limes superiors when stepping on to following terminal point position under the L shaped treadle in the right side, left and right sides crank has respectively rotated 180 ° simultaneously, at this moment right connecting rod and crank 5,5 ' conllinear and be MM, both two of and arranged on left and right sides groups of four-bar mechanisms were after once stepping, exchanged initial position separately, step continuously repeatedly the L shaped treadle in the left and right sides then bicycle move continuously.

Claims

1. four bar driver trains of a rickshaw, comprise axis 7, following chain stay 2 back cant beams 14, treadle axle 4,4 ', and the assembly 3 that is connected, crank 5,5 ' L shaped treadle 6,6 ', connecting rod 11,11 ', sprocket wheel 10, chain 13, rear flywheel 1, it is characterized in that L shaped treadle is by the treadle axle 4 on the assembly 3 that is connected, 4 ' be fixed on down on chain stay 2 and the back cant beam 14, the long limit of L shaped treadle last be treadle, pedal 8 is established in its outer end, 8 ', minor face is being down a rocking bar, rocking bar Xiao 12 is established in its outer end, 12 ', a left side, right crank 5 ', 5, be fixed on axis two outer ends symmetry each other, fixing crank Xiao 9 is established in its outer end, 9 ', connecting rod 11,11 ' two stomidiums by bearing respectively with rocking bar Xiao 12,12 ' and crank Xiao 9,9 ' be connected, constitute two packet sizes crank identical and by Middle axle crank interlock and start the angle and be not less than 12 ° and do not have the four bar driver trains that start dead points, and by being fixed on sprocket wheel 10 and the chain 13 on the axis, rear flywheel 1 constitutes the sealed joint transmission.

2. four bar driver trains of a kind of rickshaw according to claim 1 is characterized in that the center, swing hole of L shaped treadle is located at its junction point place, and are connected its pivot angle Ψ≤60 ° with treadle axle 4,4 ' one-tenth running-fit.

3. four bar driver trains of a kind of rickshaw according to claim 1 is characterized in that treadle axle 4,4 ' parallel with axis 7, and the interaxle upper and lower of chain stay 2 down, back also can be located on the chain stay in can being located at, and is changed to axis when being used for manual tricycle.

4. four bar driver trains of a kind of rickshaw according to claim 1 is characterized in that connecting rod and the crank drive line angle in the treadle start bit, have both started angle γ o=12 °～20 °, and have got higher value as far as possible.